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Updated: Oct 28, 2026

Preparation of N-(2-alkoxyvinyl)sulfonamides from N-tosyl-1,2,3-triazoles and Subsequent Conversion to Substituted Phthalans and Phenethylamines
Published on: January 3, 2018
Bio-Based Phthalonitrile Bearing a Schiff Base Moiety as a High-Performance Modifier for Epoxy Resins: Curing
Cong Peng1, Chenxu Liu1, Zhanjun Wu1,2
1College of Fiber Engineering and Equipment Technology, Jiangnan University, Wuxi 214122, China.
Abstract:
The thermal stability of epoxy resin (EP) constitutes one of the major bottlenecks restricting its high-temperature applications. Bio-based phthalonitrile resin (FUPN) bearing a Schiff base unit was utilized as a reactive modifier for a diglycidyl ether of bisphenol F (DGEBF)/diaminodiphenyl sulfone (DDS) system. The effects of FUPN on the thermal performance of cured epoxy networks were investigated. The glass transition temperature (Tg) of the cured thermosets increased from 161 °C for neat DGEBF/DDS (EP/FU0) to 231 °C for EP/FU50. The char yield at 800 °C under N2 atmosphere rose from 21.4 wt% to 57.7 wt%, while the maximum mass loss rate decreased from 14.3%/min to 3.7%/min. The char yield under air atmosphere at 800 °C was remarkably enhanced from 3.4 wt% to 31.5 wt%. The char residues were further characterized via XPS and Raman spectroscopy. The peak heat release rate and total heat release of the thermoset during combustion were reduced by 76.7% and 54.2%, respectively. Furthermore, the uncured mixture maintained a low viscosity (<2 Pa·s) at moderate temperatures even with a high loading of FUPN, which is highly favorable for practical engineering applications.
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